BMB/ACU Road to MotoGP Championship Regulations 2025

CLASS REGULATIONS
AND RULES

 

AGE  6 to 10

  • Riders 6 years of age and above who have either completed training and assessment at an Official Academy or have a proven record of competing in at least 1 full season of racing and have a curent ACU Minibike Licence, will be able to enter the Mini Moto class. They will be further assessed on their ability to take part in the racing over the pre-event practice sessions. This will continue during the event and if any concerns are raised, they will not be permitted to continue for their, and other riders, safety.

 

MINIMUM OVERALL WEIGHT

  • Not Applicable

 

PERMISSIBLE BIKES

  • Any Manufacturer

ENGINE

  • 40cc Air cooled.
  • Blata – BZM – GHR – CS Racing — Polini – Team Evolution may be fitted. The engines and all engine parts used must be as commercially available (and unmodified) to the public. However, these MUST be below the Max Output Levels when tested post-race on the trackside Dyno.
  • It may prove necessary to restrict the engine with a restrictor plate between the head and exhaust to meet the maximum Output levels for this class.  Any size of the restrictor plate can be used to achieve the required level.
  • We would strongly suggest that you test your machine on the Trackside Dyno before competing and when making modifications to the engine/carburetor that may affect the output levels. It is YOUR responsibility to make sure that your machine conforms to the regulations at all times. The Maximum Limit set is the THE LIMIT there are NO allowances.
MAX BHP MAX TORQUE LBFT
6 TBA

All readings are taken when tested on the Championships designated track side dyno.  No other readings will be considered.

BRAKES

  • Open but both Front and rear must be fully operational and work independently of each other.

FUEL

  • Standard unleaded fuel purchased from a high street forecourt only.

TYRES & WHEELS

  • Open Tyres / Maximum 6.5″” diameter wheels only.

EXHAUST

  • The exhaust must be steel and a commercially available standard and unmodified Minimoto type.
  • The noise output level must be no more than 105DBa when tested using the static test method or 98DBa when tested by Drive-By test method.

CARB

  • Maximum size 15mm.

ELECTRICS

  • The Spark Plug must be resistor type – eg NGK BR9EG, BR10EIX etc, the R denoting the resistor.

 

NOTE

You are reminded that this is a budget sport and the above regulations have been put in place in order to maintain that. There may be products available on the market that fall within the above specifications that may give your bike a noticeable advantage. We, therefore, reserve the right to exclude that or any other part in the attempt to keep all the racing as close as possible. We all want cost-effective, close competitive racing and not chequebook racing.

AGE  8 to 10

  • Riders 8 years of age and above who have either completed training and assessment at an Official Academy or have a proven record of competing in at least 1 full season of racing and have a curent ACU Minibike Licence, will be able to enter the JSM 90 class. They will be further assessed on their ability to take part in the racing over the pre-event practice sessions. This will continue during the event and if any concerns are raised, they will not be permitted to continue for their, and other riders, safety.

 

MINIMUM OVERALL WEIGHT

  • Not Applicable

 

PERMISSIBLE BIKES

  • Any Manufacturer

ENGINE

  • 90cc Semi Auto / Manual 4 speed 4 stroke Pitbike engine,  However, these MUST be below the Max Output Levels when tested post-race on the trackside Dyno.
  • We would strongly suggest that you test your machine on the Trackside Dyno before competing and when making modifications to the engine/carburetor that may affect the output levels. It is YOUR responsibility to make sure that your machine conforms to the regulations at all times. The Maximum Limit set is the THE LIMIT there are NO allowances.
MAX BHP MAX TORQUE LBFT
7.9 TBA

All readings are taken when tested on the Championships designated track side dyno.  No other readings will be considered.

BRAKES

  • Open but both Front and rear must be fully operational and work independently of each other.

FUEL

  • Standard unleaded fuel purchased from a high street forecourt only.

TYRES & WHEELS

  • Open Tyres / Maximum 10″” diameter wheels only.

EXHAUST

  • Open
  • The noise output level must be no more than 105DBa when tested using the static test method or 98DBa when tested by Drive-By test method.

CARB

  • Maximum size 22mm.

ELECTRICS

  • The Spark Plug must be resistor type – eg NGK BR9EG, BR10EIX etc, the R denoting the resistor.

 

NOTE

You are reminded that this is a budget sport and the above regulations have been put in place in order to maintain that. There may be products available on the market that fall within the above specifications that may give your bike a noticeable advantage. We, therefore, reserve the right to exclude that or any other part in the attempt to keep all the racing as close as possible. We all want cost-effective, close competitive racing and not chequebook racing.

 

AGE  8 to 12

  • Riders 8 years of age and above who have either completed training and assessment at an Official Academy or have a proven record of competing in at least 1 full season of racing and have a curent ACU Minibike Licence, will be able to enter the MGP 110  class. They will be further assessed on their ability to take part in the racing over the pre-event practice sessions. This will continue during the event and if any concerns are raised, they will not be permitted to continue for their, and other riders, safety.

 

MINIMUM OVERALL WEIGHT

  • Not Applicable

 

PERMISSIBLE BIKES

  • Any Mini GP Style Bike.

ENGINE

  • 110cc Automatic, Semi Automatic or 4 speed manual gearbox allowed.
  • However, these MUST be below the Max Output Levels when tested post-race on the trackside Dyno.
  • We would strongly suggest that you test your machine on the Trackside Dyno before competing and when making modifications to the engine/carburetor that may affect the output levels. It is YOUR responsibility to make sure that your machine conforms to the regulations at all times. The Maximum Limit set is the THE LIMIT there are NO allowances.
MAX BHP MAX TORQUE lbft
13 TBA

 

BRAKES

  • Open but both Front and rear must be fully operational and work independently of each other.

FUEL

  • Standard unleaded fuel purchased from a high street forecourt only.

TYRES & WHEELS

  • Open Tyres / Maximum 10″” diameter wheels only.

EXHAUST

  • Open however the noise output level must be no more than 105DBa when tested using the static test method or 98DBa when tested by Drive-By test method.

CARB

  • Maximum size 24mm.

ELECTRICS

  • The Spark Plug must be resistor type – eg NGK BR9EG, BR10EIX etc, the R denoting the resistor.

 

NOTE

You are reminded that this is a budget sport and the above regulations have been put in place in order to maintain that. There may be products available on the market that fall within the above specifications that may give your bike a noticeable advantage. We, therefore, reserve the right to exclude that or any other part in the attempt to keep all the racing as close as possible. We all want cost-effective, close competitive racing and not chequebook racing.

 

AGE  10 to 14

  • Riders 10 years of age (or 9 if their 10th birthday falls before the end of September in the championship year)  and above  who hold a current ACU Mini Bike Licence will be able to enter this class, they will be assessed on their ability to take part in the racing over the pre-event practice sessions. This will continue during the event and if any concerns are raised, they will not be permitted to continue for their, and other riders, safety.
  • All riders without a proven race record of at least 4 major events must wear a Hi-viz Novice bib.

 

MINIMUM OVERALL WEIGHT

  • Not Applicable

 

PERMISSIBLE BIKES

  • Any Mini GP Style Bike.

ENGINE

  • 160cc 4 stroke 4 speed 0r 50cc 2 stroke 6 speed manual gearbox engine allowed.
  • However, these MUST be below the Max Output Levels when tested post-race on the trackside Dyno.
  • We would strongly suggest that you test your machine on the Trackside Dyno before competing and when making modifications to the engine/carburetor that may affect the output levels. It is YOUR responsibility to make sure that your machine conforms to the regulations at all times. The Maximum Limit set is the THE LIMIT there are NO allowances.
MAX BHP MAX TORQUE lbft
15.8 TBA

 

BRAKES

  • Open but both Front and rear must be fully operational and work independently of each other.

FUEL

  • Standard unleaded fuel purchased from a high street forecourt only.

TYRES & WHEELS

  •  Open Tyres / Maximum 12″” diameter wheels only.

EXHAUST

  • Open however the noise output level must be no more than 105DBa when tested using the static test method or 98DBa when tested by Drive-By test method.

CARB

  • Maximum size 28mm.

ELECTRICS

  • The Spark Plug must be resistor type – eg NGK BR9EG, BR10EIX etc, the R denoting the resistor.

 

NOTE

You are reminded that this is a budget sport and the above regulations have been put in place in order to maintain that. There may be products available on the market that fall within the above specifications that may give your bike a noticeable advantage. We, therefore, reserve the right to exclude that or any other part in the attempt to keep all the racing as close as possible. We all want cost-effective, close competitive racing and not chequebook racing.

 

AGE  12 to 16 Juniors – 16Plus Seniors

  • Riders 12 years of age (or 11 if their 12th birthday falls before the end of September in the championship year)  and above, who hold a current ACU Minibike Licence will be able to enter this class, they will be assessed on their ability to take part in the racing over the pre-event practice sessions. This will continue during the event and if any concerns are raised, they will not be permitted to continue for their, and other riders, safety.
  • All riders without a proven race record of at least 4 major events must wear a Hi-viz Novice bib.

 

MINIMUM OVERALL WEIGHT

  • Not Applicable

 

PERMISSIBLE BIKES

  • Any Mini GP Style Bike.

ENGINE

  • 190cc 4 stroke 4 speed 0r 70cc 2 stroke 6 speed manual gearbox engine allowed.
  • However, these MUST be below the Max Output Levels when tested post-race on the trackside Dyno.
  • We would strongly suggest that you test your machine on the Trackside Dyno before competing and when making modifications to the engine/carburetor that may affect the output levels. It is YOUR responsibility to make sure that your machine conforms to the regulations at all times. The Maximum Limit set is the THE LIMIT there are NO allowances.
MAX BHP MAX TORQUE lbft
25 TBA

 

BRAKES

  • Open but both Front and rear must be fully operational and work independently of each other.

FUEL

  • Standard unleaded fuel purchased from a high street forecourt only.

TYRES & WHEELS

  • Open Tyres / Maximum 12″” diameter wheels only.

EXHAUST

  • Open however the noise output level must be no more than 105DBa when tested using the static test method or 98DBa when tested by Drive-By test method.

CARB

  • Maximum size 28mm.

ELECTRICS

  • The Spark Plug must be resistor type – eg NGK BR9EG, BR10EIX etc, the R denoting the resistor.

 

NOTE

You are reminded that this is a budget sport and the above regulations have been put in place in order to maintain that. There may be products available on the market that fall within the above specifications that may give your bike a noticeable advantage. We, therefore, reserve the right to exclude that or any other part in the attempt to keep all the racing as close as possible. We all want cost-effective, close competitive racing and not chequebook racing.

Please click the link below for the 2024 Ohvale 110 Cup regulations.

 

AWAITING UPDATE FROM OHVALE

To view the FIM 2024 MiniGP World Series Regulations please click the link below.

 

2024 FIM MiniGP Regulations

 

 

To view the FIM 2024 MiniGP World Series Regulations please click the link below.

 

2024 FIM MiniGP Regulations

 

AGE  12 Plus

  • Riders 12 years of age (or 11 if their 12th birthday falls before the end of September in the championship year)  and above, who hold a current ACU Minibike Licence will be able to enter this class, they will be assessed on their ability to take part in the racing over the pre-event practice sessions. This will continue during the event and if any concerns are raised, they will not be permitted to continue for their, and other riders, safety.
  • All riders without a proven race record of at least 4 major events must wear a Hi-viz Novice bib.

ALL MACHINES

All bikes are required to pass scrutineering for class compliance.

It is the rider’s responsibility to ensure that any machine that is taking part is.

Mechanically and structurally safe to be ridden during competition.

With the addition of a lock wired oil sump plug and filler plug.

A rear red rain/night light (thelight must work).

Self-closing throttle

Leakproof petrol and oil filler caps.
These must be locked to prevent accidental opening.

Oil catch bottle/tank fitted to the:
Gear box breather pipe.
Fuel tank breather pipe.

Carburetor overflow pipe
Radiator overflow pipe where applicable

Forced induction such as turbos and super chargers is prohibited in all classeS EXCEPT GP Framed 50cc Modern Machines. 

Stock 125 – out the shop class

Entry Requirements bike.

ENGINE

Maximum 125cc original engine

The use of superchargers/turbochargers is prohibited

Only four stroke OE homologated road engines.

No competition engines

ENGINE TUNING

Engine Tuning is not permitted and must remain OE standard with no internal modifications
Starter motors if originally fitted must remain and be functional
No modification to the timing of the engines ignition pick-up or flywheel allowed

Cutting of the ignition/fuelling for the purpose of changing gears is allowed by a quick shifter mechanism

Replacement parts only OE or pattern to OE spec parts can be used in engines 1.4.2.The only liquid engine coolant permitted is water
Oil sump plug and filler plug must be lock wired

FUELLING

Air filter and box may not be changed or removed.

Original OE Fuel Injection to remain as fitted from manufacturer

All air-cooled engines have “NO” carb size restrictions

Any carb “UPTO” standard OE diameter permitted on water-cooled carb engines

Jets/needles/tubes may be changed on carburettors

Fuel mapping plug in boxes e.g., power commanders/resistors/ignition boxes can be fitted but standard OE

ECU/CDI must still be used

Only OE supplied ECU/CDI permitted (Euro/USA/UK all models ECU/CDI permitted) NO altered or race ECU/CDI

EXHAUST

OE Exhaust must be fitted with an airbox fitted
Extra exhaust restrictions may exist where noise restrictions are in place.

Baffles and wadding should be in place and Wadding or other sound deadening should be checked regularly and replaced if they become worn or insufficient to carry out its intended purpose.

CHASSIS

Seat subframe may be modified/changed

No homemade frames

No one off frames

No competition frames

SUSPENSION

The forks must remain standard OE

internal modifications are allowed

external preload adjusters allowed.
“ANY” forks fitted to the same make/model of bike irrespective of year eg YZF-125 any year YZF-r125

forks/wheels, CBR125 any year forks/wheels “BUT” all parts must be originally fitted from the same Manufacturer

Rear shocks can be modified/replaced with no restrictions if they fit the original mounting points

WHEELS

Remain OE fitment for manufacturer permitted size 16′′ 17′′ 18′′

BRAKES

Pads, lines, master cylinders, discs, and footrest/hangers are allowed to be changed

Disc’s must remain the OE diameter for the model of bike.

DRIVE

Any chain and sprocket size can be used

TYRES

Any tyres permitted

Tyre warmers are permitted

BODYWORK

Any aftermarket fibreglass bodywork is permitted
Standard road bodywork is permitted but must have mirrors/stands removed.

Head lamp and rear light glasses must be adequately taped to prevent splintering.

Unused wiring for lights and switches etc may be removed.

A red rain light MUST be fitted to the rear of the Motorcycle

GP Framed 50cc Modern Machines. 

ENGINE

Engine capacity.

The maximum allowed cubic capacity of the engine is 50 cc for naturally aspirated engines and 25 cc for engines fitted with a supercharger/turbocharger.

TRANSMISSION

Only manual transmission systems are permitted with a minimum of three gears and a maximum of six

WHEELS

Permitted wheel diameters are 16” 17” 18”

BRAKES

No restrictions regarding brakes.

TYRES

Wet / slick and intermediate tyres are permitted as are tyre warmers.

GENERAL

The bike must meet ACU road racing standing regulations in every other respect.

NUMBERS

Red plates with white numbers.

MAX OUTPUT LIMITS

MAX BHP MAX TORQUE LBFT
16.5 TBA

All readings are taken when tested on the Championships designated track side dyno.  No other readings will be considered.

AGE  14 Plus

  • Riders 14 years of age (or 13 if their 14th birthday falls before the end of September in the championship year)  and above, who hold a current ACU Minibike Licence will be able to enter this class, they will be assessed on their ability to take part in the racing over the pre-event practice sessions. This will continue during the event and if any concerns are raised, they will not be permitted to continue for their, and other riders, safety.

MINIMUM OVERALL WEIGHT

  • 132 kg inc Rider, Kit & Bike (ie as raced)

 

PERMISSIBLE BIKES

  • Any SM or Mini GP Style bike with a maximum seat height of 84cm

ENGINE

  • 140cc Manual 4 speed – 4 stroke Pitbike engine, However, these MUST be below the Max Output Levels when tested post-race on the trackside Dyno.
  • We would strongly suggest that you test your machine on the Trackside Dyno before competing and when making modifications to the engine/carburetor that may affect the output levels. It is YOUR responsibility to make sure that your machine conforms to the regulations at all times. The Maximum Limit set is the THE LIMIT there are NO allowances.
MAX BHP MAX TORQUE LBFT
15 TBA

All readings are taken when tested on the Championships designated track side dyno.  No other readings will be considered.

BRAKES

  • Open but both Front and rear must be fully operational and work independently of each other.

FUEL

  • Standard unleaded fuel purchased from a high street forecourt only.

TYRES & WHEELS

  • Open Tyres / Maximum 12″” diameter wheels only.

EXHAUST

  • Open
  • The noise output level must be no more than 105DBa when tested using the static test method or 98DBa when tested by Drive-By test method.

CARB

  • Maximum size 26mm.

ELECTRICS

  • The Spark Plug must be resistor type – eg NGK BR9EG, BR10EIX etc, the R denoting the resistor.

 

NOTE

You are reminded that this is a budget sport and the above regulations have been put in place in order to maintain that. There may be products available on the market that fall within the above specifications that may give your bike a noticeable advantage. We, therefore, reserve the right to exclude that or any other part in the attempt to keep all the racing as close as possible. We all want cost-effective, close competitive racing and not chequebook racing.

AGE  14 Plus (VETS 40PLUS)

  • Riders 14 years of age (or 13 if their 14th birthday falls before the end of September in the championship year)  and above, who hold a current ACU Minibike Licence will be able to enter this class, they will be assessed on their ability to take part in the racing over the pre-event practice sessions. This will continue during the event and if any concerns are raised, they will not be permitted to continue for their, and other riders, safety.

 

MINIMUM OVERALL WEIGHT

  • 132 kg inc Rider, Kit & Bike (ie as raced)

 

PERMISSIBLE BIKES

  • Any SM or Mini GP Style bike with a maximum seat height of 84cm

ENGINE

  • Max 160cc Manual 4 speed – 4 stroke Pitbike engine, However, these MUST be below the Max Output Levels when tested post-race on the trackside Dyno.
  • We would strongly suggest that you test your machine on the Trackside Dyno before competing and when making modifications to the engine/carburetor that may affect the output levels. It is YOUR responsibility to make sure that your machine conforms to the regulations at all times. The Maximum Limit set is the THE LIMIT there are NO allowances.
MAX BHP MAX TORQUE LBFT
16 TBA

All readings are taken when tested on the Championships designated track side dyno.  No other readings will be considered.

BRAKES

  • Open but both Front and rear must be fully operational and work independently of each other.

FUEL

  • Standard unleaded fuel purchased from a high street forecourt only.

TYRES & WHEELS

  • Open Tyres / Maximum 12″” diameter wheels only.

EXHAUST

  • Open
  • The noise output level must be no more than 105DBa when tested using the static test method or 98DBa when tested by Drive-By test method.

CARB

  • Maximum size 26mm.

ELECTRICS

  • The Spark Plug must be resistor type – eg NGK BR9EG, BR10EIX etc, the R denoting the resistor.

 

NOTE

You are reminded that this is a budget sport and the above regulations have been put in place in order to maintain that. There may be products available on the market that fall within the above specifications that may give your bike a noticeable advantage. We, therefore, reserve the right to exclude that or any other part in the attempt to keep all the racing as close as possible. We all want cost-effective, close competitive racing and not chequebook racing.

AGE  14 Plus

  • Riders 14 years of age (or 13 if their 14th birthday falls before the end of September in the championship year)  and above, who hold a current ACU Minibike Licence will be able to enter this class, they will be assessed on their ability to take part in the racing over the pre-event practice sessions. This will continue during the event and if any concerns are raised, they will not be permitted to continue for their, and other riders, safety.

 

MINIMUM OVERALL WEIGHT

  • 132 kg inc Rider, Kit & Bike (ie as raced)

 

PERMISSIBLE BIKES

  • Any SM Style bike with a maximum seat height of 84cm

ENGINE

  • Max 212cc Manual 4 speed – 4 stroke Single Cylinder or 112cc Manual 2 Stroke engine, There is no Maximum output set for this class as it is deemed an “Open” Class.

BRAKES

  • Open but both Front and rear must be fully operational and work independently of each other.

FUEL

  • Open.

TYRES & WHEELS

  • Open Tyres / Maximum 12″” diameter wheels only.

EXHAUST

  • Open
  • The noise output level must be no more than 105DBa when tested using the static test method or 98DBa when tested by Drive-By test method.

CARB

  • Open.

ELECTRICS

  • The Spark Plug must be resistor type – eg NGK BR9EG, BR10EIX etc, the R denoting the resistor.

CHAMPIONSHIP RULES
AND REGULATIONS

1.1 Eligibility

  1. All competitors must hold a current competition license for Road Racing or Mini Bike / Pocket Bike Racing issued by the Auto Cycle Union.

1.2 Categories

SEE INDIVIDUAL CLASSE SUPPLEMENTARY REGULATIONS

2.1 Protective Clothing

  1. Protective Clothing: MiniMoto – One-piece leather race suits or proprietary Mini Moto race suits are acceptable for Junior Riders. A back protector must be included in the suit or worn separately.
  2. Protective Clothing: MiniGP – One-piece leather race suits only. A back protector must be included in the suit or worn separately.
  3. Race Boots: Must be leather and have good ankle protection. There must be no gap between the top of the boots and the bottom of the race suit when in a riding position. Lether must be worn. Trainers/ Trainer boots will NOT be allowed.

2.2 Jewellery

  1. It is recommended that all body piercing, studs, rings, etc are removed

2.3 Helmets

  1. All competitors must wear a Helmet bearing the current ACU gold stamp and in sound condition and properly fitted while practising and racing. Overseas riders may use helmets as approved by their own FMN.

2.4 Identification Discs

  1. While practising and racing, riders and passengers are required to wear an identification disc around the neck, attached by a material approved by the technical officer. Thin chains should be avoided. The disc must be permanently marked with the wearer’s full name and date of birth. Identification discs shall be of a durable material, circular in shape, between 20mm and 25mm in diameter and having rounded edges with no sharp or ragged projections.

3.1 Mini Moto Specifications

  1. Wheelbase  – 730mm Maximum
  2. Length – 1060mm Maximum
  3. Saddle Height – 450mm Maximum
  4. Total Height – 620mm Maximum
  5. Footrests – Non-Folding 60mm minimum Plastic or Rubber Round Tipped. A Tolerance of 5% Minimum Tip is allowed.
  6. Clutch – must be dry centrifugal clutch keyed into the crankshaft.
  7. Start – The Engine must have a recoil pull starting device fitted.

3.2 Mini GP / Mini Bike Specifications

  1. Wheelbase – 1550mm Maximum
  2. Length – 1950mm Maximum
  3. Saddle Height – 870mm Maximum
  4. Total Height – 935mm Maximum
  5. Footrests – Folding 60mm Minimum Plastic or Rubber Round Tipped. A Tolerance of 5% Minimum Tip is allowed.

3.3 Carburettors

  1. SEE INDIVIDUAL CLASSE SUPPLEMENTARY REGULATIONS

3.4 Spark Plugs

  1. No Restrictions but must be “R” (Resistor) type to prevent interference with transponders used for timing.

3.5 Fuel

  1. Only unleaded fuel, that can be obtained from a roadside petrol Station can be used.

3.6 Kill Switch

  1. A kill switch must be located on the handlebars adjacent to the headstock. The Kill switch must be fully functional.

3.7. Coolant

  1. Water Cooled – Water with no additives is the only coolant permitted in water-cooled (LC) engines.
  2. Oil Cooled –  oil fed from the engine casings only.

3.8 Oil & Coolant Containment.

  1. All 4-stroke machines must be fitted with either a metal catch tank mounted below the engine or, for machines fitted with a full fairing, a catchment “tray” constructed in the lower cowling to hold 1.5 times the volume of the engine oil capacity.
  2. Oil lines containing positive pressure must be of metal or metal-reinforced construction, with swaged or threaded connectors. All connector bolts, drain, and filler plugs must be tight and drilled, and wired into position.

3.9 Wheels

  1. Mini Motos – Any make of wheel is permitted. The diameter of the wheel and tyre is 6.5 inches maximum. The width of the wheels is 110mm maximum.
  2. MiniGP / Mini  Bikes – Maximum 17″  unless restricted in supplementary regulations for a class.

3.10 Tyres

  1. Mini Motos – Any make of tyre, slick or treaded is permitted unless restricted in supplementary regulations for a class.
  2. MiniGP / Mini  Bikes – Any make of tyre, slick or treaded is permitted unless restricted in supplementary regulations for a class.

3.11 Brakes

  1. Cable or hydraulic-operated brakes are required on both front and rear wheels and must be able to be operated independently.

3.12 Transmission

  1. By chain with any ratios. A chain guard must be fitted in such a way as to prevent trapping between the chain run and both the front and rear-driven sprockets. A shark fin chain protector should be fitted to the rear of the machine where possible.

3.13 Exhaust

  1. Make / type as per event and individual class supplementary regulations with noise control restrictions (see below)

3.14 Noise Control

  1. The maximum permitted level will be as specified by the circuit used. In general, this will be 98Dba measured at a specific location on the circuit.

3,15 Bodywork

  1. Mini Motos – Fairing and Streamlining are permitted. Covering of the headstock is compulsory.
  2. MiniGP – Must use full fairing as per original manufacturer specifications. Copies of all original bodywork permitted (unless prohibited in specific class supplementary regulations)
  3. Mini Bikes – Side Panels, Seat Cowling and Number Boards must be fitted securely with no sharp edges.

3.16 All Bikes must be fitted with the following:

  1. BOBBINS – Drilled Axles with Crash Bobbins firmly fitted. (you can attach bobbins to the Fork Legs or Attached to the Swing Arm but they must be firmly in place and in a position that stops the axles from digging into the track surface in the event of a crash.
  2. KILL SWITCH – All bikes must be fitted with a WORKING Kill switch to the LH Side Handle Bar (except the Ohvale 110 cup class which must be on the RH Side as stated in the Ohvale European regulations).
  3. RACE NUMBERS – The CORRECT race number for the rider must be fitted to both the front and the sides of the motorcycle at all times. The numbers MUST be a single colour and in strict contrast to a single colour background and clearley visible. They must be a minimum size of:   FRONT numbers are:  Background 285mm by 235mm Height of figure 140mm – Width of figure 80mm  – Width of stroke 25mm  – Space between two figures 15mm 7. The minimum dimensions of SIDE numbers are:  Background 260mm by 220mm  – Height of figure 120mm – Width of figure 70mm -Width of stroke 25mm  – Space between two figures 15mm
  4. NYLON BAR ENDS – All  Mini GP / Mini Bikes / Mini Motos must be fitted with Nylon ends to the handlebars.
  5. SUMP PLUGS – All Bikes must be fitted with a drilled sump plug that must be lock wired in place.
  6. OIL FILLER CAPS – All bikes must be fitted with a drilled oil filler cap that must be lock wired in place.
  7. NYLON PEG ENDS – All Mini GP / Mini Bike Style & Mini Moto bikes must be fitted with Nylon Foot Peg ends with NO metal bolt or edge able to contact the Tarmac in the event of a crash.
  8. OVERFLOW / BREATHER PIPES – All overflow and breather pipes must end in a suitable plastic or metal container such as a small drinks can. This must be firmly attached to the frame of the bike and must be sealed.

 

SPECIAL NOTE

  • ONBOARD CAMERAS – As of 2017 onwards ALL onboard cameras must be fixed securely to the bike and CAN NOT be worn on the body or helmet. This is a stipulation direct from the Permit Issuers and has also been requested by the Insurers. Please make sure the camera is fixed in place before you take your bike to the safety inspection area.

* UNDER REVIEW *

5.1 MEDICAL SERVICES. MINIMUM REQUIREMENTS FOR MINI BIKE MEETINGS

The minimum requirements for practice or racing to commence are as follows:

1 Doctor and 1 Paramedic, 2 Ambulances with 2 Ambulance Technicians

If one Ambulance has to leave the venue for any reason, the event can continue provided that there are a minimum of 1 ambulance, 1 Doctor & 1 Technician present and available.

Whenever possible a First Aid Technician and a second Ambulance should be made available.

Ambulance A vehicle registered as an ambulance with the DVLA (Driver and Vehicle Licensing Agency) and registered with CQC if appropriate.

An ambulance must have an appropriately qualified driver to transport a casualty under blue lights. It must be equipped with the FIM minimum equipment regulations for a type C vehicle; that is:

Medical: A stretcher (preferably standardised), oxygen supply, apparatus to immobilise limbs and vertebral column. Firstaid medicaments and materials.

Technical: Radio communication. Visible and audible signals.

Staffing: An ambulance must be staffed by two First Aid Personnel (who can be the two minimum First Aid personnel).

An ambulance may act as a Medical Centre BUT if so it must be a vehicle in addition to the minimum ambulance requirements and must not be allowed to leave the circuit.

First Aid Personnel A person holding a current certificate of First Aid competency. (Where an event is open to the public event organisers should ensure that all First Aid personnel are insured against malpractice for the event concerned).

Special Notes

The minimum medical requirements specific for this discipline also apply to associated Test Days.

Concussion/Suspected Concussion

If a competitor is involved in an incident that results in him/her being diagnosed by the Medical Officer/Paramedic as suffering from concussion/suspected concussion, the rider is not permitted to participate any further in that event.Organisers are to notify ACU Head Office as soon as possible of any concussion/suspected concussion injuries and then will subsequently:

a) Place the rider on the ACU Stop List
b) Inform Organisers of forthcoming events that the Rider has suffered a concussion/suspected concussion injury and is therefore placed on the ACU Stop List
c) Inform the Rider that he needs to see a Doctor and obtain a letter/doctor’s certificate that confirms he is fit to resume competitive racing/participate in a practice/test session.

The recovery time for anyone diagnosed with concussion/suspected concussion is as follows:

a) Over 20 years: Excluded immediately and suspended for a period of nine days.
b) 16–19 years: Excluded immediately and suspended for a period of twelve days.
c) 15 and under: Excluded immediately and suspended for a period of twenty three days.

The rider is not permitted to ride during the obligatory suspended periods outlined above and then only once he/she is in possession of a doctor’s certificate/letter after the suspended period has expired. A rider may be signed off to ride by the CMO at an event once he has observed the obligatory suspended period outlined above.

If a competitor has been injured on a Saturday and is suffering from concussion/suspected concussion, and the Organiser is aware that the rider was intending to ride or is scheduled to ride somewhere else the next day, the Organiser will inform the Organiser of the event being held the next day so they are aware of the rider’s injuries and as such he is prevented from participating in that event.

6.01 CHAMPIONSHIP STATUS

The Championship will be held under the auspices of the ACU Ltd.

6.02 CHAMPIONSHIP ROUNDS AND VENUES

There will be a minimum of 5 two day events between March and October.

6.03 CIRCUITS

The circuit should be inspected and approved by the ACU Track Inspector.  The minimum width should be 6 metres. The minimum length should be 500 with the maximum length to be set at the track inspection.

6.04 GRID AND STARTING NUMBERS

The grid should be set out during the track inspection, but should in principle be a 3 × 3  or 2 x 2 solo grid with 6 metres between each staggered rider. In principle the grid capacity should be a maximum of 28 machines with a 50% additional allowance for qualifying or practice unless the ACU Track Inspector sets a lower limit during the inspection.

6.05 PRACTICE AND QUALIFYING

There will be a minimum of 15 minutes of practice/qualifying allocated to each class at each event. Participation in these sessions is compulsory for a minimum of 3 laps. On the 2nd day of a two-day meeting, a minimum of 8 minutes of practice must be made available to every competitor. Participation in the 2nd day free practice is not compulsory.

Testing or practice at the same venue is prohibited for the 72 hours preceding each championship round unless specified in class supplementary regulations.

Each grid will be set based on lap times recorded during each qualifying practice.

6.06 CHAMPIONSHIP LICENCE

An ACU Mini/Pocket-Bike Championship Licence will be required in order to take part in the series.

6.07 COMPETITOR TRAINING

As this is an entry-level to tarmac racing, no previous competition experience is required, but every competitor must attend a rider’s briefing and induction course before participating in their first event. Once the induction course has been received, a validation sticker will be added to the back of the competitor’s ACU Licence.

6.08 CHAMPIONSHIP POINTS

Points will be awarded for each championship race on the scale 25.20.16.13.11.10.9.8.7.6.5.4.3.2.1. If at the end of the season, there is a tie on the points then the highest number of wins will determine the winner, should that be equal then the 2nds, 3rds, etc will be taken into account until a winner is established.

7.01 Authorisation & Permits

The 2025 BMB Road to MotoGP events will be authorised and permitted by the ACU.

 

8.01 – Two Day Event

Each class will follow one of the following formats based on registered rider feedback and will be published in the final instructions for each event.

Format 1

DAY 1

07:00 Rider Sign On Please attend race control to sign the sign-on forms, Present your license for inspection, and collect your hire transponder if applicable.

07:00 Technical Inspection  Please take your bike and kit to the inspection area (usually in the pit lane entrance). The Technical Inspectors will check your bike and kit to make sure that it meets the basic requirements. They will issue you with a sticker that must be displayed on your vehicle throughout the event. *Please note if you do not have your full kit with you will not pass inspection and may have to queue up again.

08:00 to 08:45 – Compulsory Riders Briefing ALL riders must attend a compulsory riders briefing. The time slot allocated for your class will be shown in the final instructions for the event.

09:00 First Practice sessions commence. Each class will have two practice sessions before the Marshall’s break.

13:00 (Approx)  Qualifying.    Each class will have aQualifying session, the time set will be used to formulate the grid for Race 1.

15:00 (Approx) Race 1.  This will be a Sprint race and the amount of laps based on the circuit size and weather conditions

 

DAY 2 

09:00 Morning Warmup

Each class will get a warm up session

11:00 (Approx)  Race 2

The Grid position for Race 2 will be taken from your fastest time set in in Race 1. The amount of laps will be based on the circuit size and weather conditions

14:00 (Approx)  Race 3

The grid position for Race 2 will be determined by the fastest time set in Race 2. The amount of laps will be based on the circuit size and weather conditions

Pit Lane Will Close after the last Race of the Day

Format 2.

DAY 1.

07:00 Rider Sign On Please attend race control to sign the sign-on forms, Present your license for inspection, and collect your hire transponder if applicable.

07:00 Technical Inspection  Please take your bike and kit to the inspection area (usually in the pit lane entrance). The Technical Inspectors will check your bike and kit to make sure that it meets the basic requirements. They will issue you with a sticker that must be displayed on your vehicle throughout the event. *Please note if you do not have your full kit with you will not pass inspection and may have to queue up again.

08:00 to 08:45 – Compulsory Riders Briefing ALL riders must attend a compulsory riders briefing. The time slot allocated for your class will be shown in the final instructions for the event.

09:00 First Practice sessions commence. Each class will have two practice sessions before the Marshall’s break.

13:30 (Approx) Qualifying sessions Commence.    Each class will have 2 Qualifying session, the fastest time set over both sessions will be used to formulate the grid for Race 1.

 

DAY 2 

09:00 Morning Warmup

Each class will get a warm up session

11:00 (Approx)  Race 1

The Grid position for Race 1 will be taken from your fastest time set in over both Qualifying sessions. The amount of laps will be based on the circuit size and weather conditions

13:45 (Approx)  Race 2

The grid position for Race 2 will be determined by the fastest time set in Race 2. The amount of laps will be based on the circuit size and weather conditions

15:00 (Approx)  Race 3

The grid position for Race 13will be determined by the fastest time set in Race 2. The amount of laps will be based on the circuit size and weather conditions

Pit Lane Will Close after the last Race of the Day

DYNO TESTING LEVELS FOR 2024 SEASON

After extensive testing and data acquisition by ourselves and the official BMB Dyno operator, we have formulated the following bhp and torque allowances that we feel are fair for each of the controlled classes.

The testing procedure developed allows for all riders to be tested quickly in a like-for-like manner incorporating settings that make allowances for differing gear ratios, wheel sizes, tyre pressures, and atmospheric conditions.

Because of the nature of all the variables that are involved in Dyno testing, not excluding the different makes in testing equipment, all Dynos will read differently when testing the same machinery and, in some cases, quite dramatically.

However, by using the same equipment and type of tests at each event we can establish what is determined as a max level for the controlled classes we run when tested on the same settings.

To be deemed compliant your engine must not exceed the following maximum output levels for your class.

 

CLASS

MAX BHP

MAX TORQUE
MINI MOTO 

6

TBA

JUNIOR SM 90

7.9

5.5
MINI GP 110

13

TBA
MINI GP 160

15.8

10.9
MINI GP 190

25

16.8
MINI BIKE 140

15

10.5
MINI BIKE 160

16.3

10.9
MINI BIKE 190

24.9

16.8
SUPERMINI

(OPEN)

 

Be warned that any modifications (that are allowed for your class) that you make to your engine or carburettor may potentially push your output to just over this limit and therefore risk you being excluded. Therefore, if making these modifications we would strongly suggest that you have your bike tested by having a basic power run done by The Official BMB Dyno either before the event or at the track to make sure your engine still complies with these limits.

It is your responsibility to make sure your engine complies.

No one can really object to the setting of limits because after all, we all want the same thing.

Good Cost Effective, Fair, Fun competitive Racing.